A dataset provided by the European Space Agency

Name: Gamma Cas: double trouble
Published: 2015-08-25T22:00:00Z

Proposal ID	074360
Title	Gamma Cas: double trouble
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743600101
DOI	https://doi.org/10.5270/esa-w0ttnn2
Principal Investigator, PI	Dr Jose Torrejon
Abstract	We propose to use the unique combination of high spectral resolution of XMM andthe broadband coverage of NuSTAR to advance in the study of the nature of themysterious Be/X-ray source gamma Cas. This object displays extreme conditions: avery hot plasma (>12 keV), a very hard spectrum, and a big circumstellar disk.Two hypotheses have been put forward to explain the origin of the X-ray emissionin these objects: a) accretion onto a compact companion and b) emission from thestar+disk interaction through stellar magnetic fields. Both of these challengeprofoundly our current
Publications	The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Soft and hard X-ray dips in the light curves of u03b3 Cassiopeiae \|Smith M. A. Lopes de Oliveira R. \| MNRAS \| 488-5048 \| 2019 \| 2019MNRAS.488.5048S \| http://ui.adsabs.harvard.edu/#abs/2019MNRAS.488.5048S Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z The X-ray Emission of u03b3 Cassiopeiae During the 2020-2021 Disc Eruption \|Rauw G. Nazu00e9 Y. et al. \| A&A \| 664-184 \| 2022 \| 2022A&A...664A.184R \| http://ui.adsabs.harvard.edu/#abs/2022A&A...664A.184R Variability of optical and X-ray spectra of Gamma Cassiopeia stars \|Kholtygin A. F. Ryspaeva E. B. et al. \| INASR \| 8-86 \| 2023 \| 2023INASR...8...86K \| http://ui.adsabs.harvard.edu/#abs/2023INASR...8...86K Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2014-07-24T13:33:09Z/2014-07-24T22:59:49Z
Version	17.56_20190403_1200
Mission Description	The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2015-08-25T22:00:00Z
Last Update	2026-03-04
Keywords	"gamma cas", "disk interaction", "XMM", "stellar magnetic fields", "spectral resolution", "hard spectrum", "double trouble", "broadband coverage", "compact companion", "object displays", "NuSTAR", "circumstellar disk", "xray emission", "hot plasma"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Jose Torrejon, 2015, 'Gamma Cas: double trouble', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-w0ttnn2